Securities (Tables)

6 Months Ended

Jun. 30, 2018

Securities

Schedule of amortized cost and estimated fair value of securities

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
June 30, 2018	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	339,351	$	98	$	(10,944)	$	328,505
U.S. Government sponsored entities		7,405		13		—		7,418
Total	$	346,756	$	111	$	(10,944)	$	335,923
Securities held-to-maturity:
Agency mortgage-backed securities	$	300,690	$	—	$	(11,178)	$	289,512
Municipals - exempt from Federal tax		87,913		366		(2,471)		85,808
Total	$	388,603	$	366	$	(13,649)	$	375,320

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
December 31, 2017	Cost		Gains		(Losses)		Value
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	378,339	$	786	$	(4,392)	$	374,733
Trust preferred securities		15,000		2,119		—		17,119
Total	$	393,339	$	2,905	$	(4,392)	$	391,852
Securities held-to-maturity:
Agency mortgage-backed securities	$	309,616	$	6	$	(4,394)	$	305,228
Municipals - exempt from Federal tax		88,725		946		(607)		89,064
Total	$	398,341	$	952	$	(5,001)	$	394,292

Schedule of securities with unrealized losses

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
June 30, 2018	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	195,313	$	(5,857)	$	120,351	$	(5,087)	$	315,664	$	(10,944)
Total	$	195,313	$	(5,857)	$	120,351	$	(5,087)	$	315,664	$	(10,944)
Securities held-to-maturity:
Agency mortgage-backed securities	$	171,173	$	(5,482)	$	117,589	$	(5,696)	$	288,762	$	(11,178)
Municipals - exempt from Federal tax		43,219		(1,291)		19,076		(1,180)		62,295		(2,471)
Total	$	214,392	$	(6,773)	$	136,665	$	(6,876)	$	351,057	$	(13,649)

	Less Than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
December 31, 2017	Value		(Losses)		Value		(Losses)		Value		(Losses)
	(Dollars in thousands)
Securities available-for-sale:
Agency mortgage-backed securities	$	185,824	$	(1,623)	$	146,670	$	(2,769)	$	332,494	$	(4,392)
Total	$	185,824	$	(1,623)	$	146,670	$	(2,769)	$	332,494	$	(4,392)
Securities held-to-maturity:
Agency mortgage-backed securities	$	168,439	$	(1,368)	$	130,759	$	(3,026)	$	299,198	$	(4,394)
Municipals - exempt from Federal tax		18,159		(182)		19,240		(425)		37,399		(607)
Total	$	186,598	$	(1,550)	$	149,999	$	(3,451)	$	336,597	$	(5,001)

Schedule of proceeds from sales of securities and the resulting gains and losses

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(Dollars in thousands)				(Dollars in thousands)
Proceeds	$	55,537	$	—	$	94,291	$	6,536
Gross gains		193		—		1,243		—
Gross losses		(14)		—		(977)		(6)

Schedule of amortized cost and estimated fair values of securities, by contractual maturity

	Available-for-sale
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due after one through five years	$	7,405	$	7,418
Agency mortgage-backed securities		339,351		328,505
Total	$	346,756	$	335,923

	Held-to-maturity
	Amortized		Estimated
	Cost		Fair Value
	(Dollars in thousands)
Due after 3 months through one year	$	501	$	502
Due after one through five years		3,955		4,002
Due after five through ten years		24,964		24,846
Due after ten years		58,493		56,458
Agency mortgage-backed securities		300,690		289,512
Total	$	388,603	$	375,320